Ring-shaped heat dissipating device and a manufacturing method thereof, and a heat dissipating apparatus including said ring-shaped heat dissipating device

ABSTRACT

A ring-shaped heat dissipating device made of a continuously-bending metal sheet includes a plurality of fins arranged in a radial form to form a central passage communicating from theretop to therebottom. Each of fins has a top plate, a front side plate and a rear side plate extending downwardly from opposite edges of the top plate respectively, and a bottom plate extending from a bottom edge of the rear side plate. The front side plate of one of fins connects with the bottom plate of another fin adjacent thereto. An inner edge of the top plate of one of fins adjacent to the central passage is connected with another two inner edges of two top plate plates of two fins adjacent thereto. And an inner edge of the bottom plate is connected with another two inner edges of two bottom plates of two fins adjacent thereto.

BACKGROUND OF INVENTION

1. Field of Invention

The present invention relates to a heat dissipating apparatus with a ring-shaped heat dissipating device, and in particular to a kind of heat dissipating apparatus which includes a heat transfer device and the ring-shaped heat dissipating device made of a continuously-bending metal sheet.

2. Related Prior Art

A ring-shaped heat dissipating device known in the art can be generally divided into two forms such as a combination form and a bending form. The ring-shaped heat dissipating device with the combination form is made of steps of making a plurality of fins and a ring-shaped base respectively, and then installed the fins to the base thereby forming the ring-shaped heat dissipating device with the combination form like the heat dissipating device disclosed in Taiwan Patent No. M540996. On the other hand, the ring-shaped heat dissipating device with the bending form is made of steps of providing a strip of metal sheet, and punching the metal sheet to form a plurality of fins connecting together like the heat dissipating device disclosed in Taiwan Patent No. M412305.

However, referring to the abovementioned ring-shaped heat dissipating device with the bending form of the prior art, a top edge of an inner side of each of the fins thereof is not connected with the top edge of the inner side of another fin adjacent thereto, similarly, a bottom edge of the inner side of each of the fins thereof is not connected with the bottom edge of the inner side of another fin adjacent thereto.

SUMMARY OF INVENTION

The primary object of this invention is therefore to provide a ring-shaped heat dissipating device which has improved heat dissipating effect and the manufacturing method thereof, and a heat dissipating apparatus including the ring-shaped heat dissipating device.

To achieve the object of this invention, the heat dissipating apparatus includes the ring-shaped heat dissipating device and a heat transfer device. The ring-shaped heat dissipating device defines a central passage communicating from theretop to therebottom. The heat transfer device is formed in one piece and includes a top plate which has a hole therein. A top surface of the top plate is in contact with a bottom surface of the ring-shaped heat dissipating device, and the hole of the top plate aligns to the central passage of the ring-shaped heat dissipating device.

In more detail, the ring-shaped heat dissipating device is a continuously-bending metal sheet and includes a plurality of fins arranged in a radial form and encircling the central passage. Each of the fins includes a top plate, a front side plate, a rear side plate and a bottom plate. The top plate has two parallel edges. The front side plate has a top edge and a bottom edge which are parallel with each other, and the top edge thereof connects with one of the two edges of the top plate. The rear side plate has a top edge and a bottom edge which are parallel with each other, and the top edge thereof connects with another one edge of the top plate. The bottom plate has a front edge and a rear edge which are parallel with each other, and the front edge thereof connects with the bottom edge of the rear side plate.

Moreover, the bottom edge of the front side plate of each of fins connects with the rear edge of the bottom plate of another fin which is adjacent thereto. In other words, the rear edge of the bottom plate of each of fins connects with the bottom edge of the front side plate of another fin which is adjacent thereto. The front side plate and the rear side plate of each of fins co-define a first passage communicating from outside to inside, and two adjacent fins co-define a second passage communicating from outside to inside. Each of the first passages and the second passages tapers from outside to inside.

Furthermore, top plates of the fins are located on a same level, and bottom plates of the fins are located on another same level. The top plate of each of fins has an inner edge adjacent to the central passage, and the bottom plate of each of fins has an inner edge adjacent to the central passage. The inner edges of the top plates of the fins and the inner edges of the bottom plates are respectively connected together to form a top ring edge and a bottom ring edge.

In comparison with the prior art, the inner edges of top plates and the inner edges of bottom plates are respectively closely connected together, thus, the ring-shaped heat dissipating device of present invention has an improved conductive performance. Furthermore, since the inner edges of the top plates and the bottom plates of the ring-shaped heat dissipating device of the present invention are connected together, the ring-shaped heat dissipating device has larger quantities of fins in comparison with the ring-shaped heat dissipating device of the prior art which has the same radius, height and is made of the same material. Therefore, the ring-shaped heat dissipating device of the present invention can achieve further improved heat dissipating effect.

Further benefits and advantages of the present invention will become clear as the description proceeds.

BRIEF DESCRIPTION OF DRAWINGS

The invention will now be elucidated with reference to the following description and accompanying drawings where:

FIG. 1 is a perspective view of a ring-shaped heat dissipating device according to one preferred embodiment to the present invention;

FIG. 2 is a partial enlarged drawing of FIG. 1;

FIG. 3 is a partial front view from inside to outside of the ring-shaped heat dissipating device of the preferred embodiment;

FIG. 4 is a exploded perspective view of a heat dissipating apparatus according to one preferred embodiment to the present invention;

FIG. 5 is a side view of the heat dissipating apparatus of the preferred embodiment;

FIG. 6 is a exploded perspective view of a heat dissipating apparatus according to another preferred embodiment to the present invention;

FIG. 7 is a side view of the heat dissipating apparatus of the another preferred embodiment;

FIG. 8 is a perspective view of a heat transfer device of the heat dissipating apparatus of the another preferred embodiment;

FIG. 9 is a side view of FIG. 8;

FIG. 10 is schematic view of a manufacturing method of the heat transfer device of FIGS. 6 to 8;

FIG. 11 is schematic view of one of steps of a manufacturing method of the ring-shaped heat dissipating device according to the present invention; and

FIG. 12 is schematic view of another one step of the manufacturing method of the ring-shaped heat dissipating device.

DETAILED DESCRIPTION OF EMBODIMENTS

FIGS. 1, 2 and 3 are schematic views of a ring-shaped heat dissipating device in accordance with a preferred embodiment of the present invention. The ring-shaped heat dissipating device 1 is made of a continuously-bending metal sheet, and includes a plurality of fins 10 which are arranged in a radial form and co-define a central passage 100 communicating from theretop to therebottom.

Referring to FIGS. 1 and 2, each of fins 10 comprises a top plate 11, a front side plate 12, a rear side plate 13 and a bottom plate 14. The top plate 11 has two parallel edges 111. Each of the front side plate 12 and the rear side plate has a top edge 121, 131 and a bottom edge 122, 132 which are parallel with each other. The top edges 121, 131 of the front and rear side plates 12, 13 connect with two edges 111 of the top plate 11 respectively. The bottom plate 14 has a front edge 141 and a rear edge 142 which are parallel with each other, and the front edge 141 connects to the bottom edge 132 of the rear side plate 13. And, the bottom edge 122 of the front side plate 12 of each of fins 10 connects to the rear edge 142 of the bottom plate 14 of another fin adjacent thereto. In other words, the rear edge 142 of the bottom plate 14 of each of fins connects to the bottom edge 122 of the front side plate 12 of another fin adjacent thereto.

It should be noted that top plates 11 of fins are located on a same level, and bottom plates 14 of the fins are located on a same level, as shown in FIG. 3. Furthermore, referring to FIGS. 1 and 2, each of top plates 11 and bottom plates 14 has an inner edge 112, 143. The inner edges 112 of top plates 11 are closely connected together to form a top ring edge, and the inner edges 143 of bottom plates 14 are closely connected together to form a bottom ring edge. Therefore, the front side plate 12 and the rear side plate 13 of each of fins 10 co-define a first passage 15 communicating from outside to inside, and two adjacent fins 10 co-define a second passage 16 communicating from outside to inside. Each of the first passages and the second passages tapers from outside to inside. That is to say, inner side of each of the fins 10 is closely connected with each other and thereby forming the ring-shaped heat dissipating device 1, as shown in FIG. 1.

Preferably, the fins 10 are further arranged in a circular shape, therefore the ring-shaped heat dissipating device 1 is certainly in a circular shape, as shown in FIG. 1.

Compare to the prior art, the inner edges 112 of top plates 11 and the inner edges 143 of bottom plates 14 are respectively closely connected together such that the ring-shaped heat dissipating device 1 of present invention has an improved conductive performance, therefore, the ring-shaped heat dissipating device 1 could achieve improved heat dissipating effect. Furthermore, since an inner edges 112, 143 of the top plates 11 and the bottom plates 14 of fins 10 are closely connected together, the ring-shaped heat dissipating device 1 has larger quantities of fins in comparison with the ring-shaped heat dissipating device of the prior art which has the same radius, height and is made of the same material. Thus, the ring-shaped heat dissipating device of the present invention can achieve further improved heat dissipating effect.

FIGS. 4 and 5 are schematic views of a heat dissipating apparatus 200 including the ring-shaped heat dissipating device 1 in accordance with a preferred embodiment of the present invention. The heat dissipating apparatus 200 comprises the ring-shaped heat dissipating device 1 and a heat transfer device 2 which is made of a metal sheet during a mechanical punching process. The heat transfer device 2 has a top plate 21 defining a hole 211 therein. Moreover, a top surface of the top plate 21 of the heat transfer device 2 is in contact with a bottom surface of the ring-shaped heat dissipating device 1, and the hole 211 of the top plate 21 aligns to the central passage 100 of the ring-shaped heat dissipating device 1. A bottom surface of the top plate 21 of the heat transfer device 2 is used to contact with a heat source, therefore heat generated by the heat source can be transferred through the top plate 21 of the heat transfer device 2 and then be dissipated by the ring-shaped heat dissipating device 1.

FIGS. 6 and 7 are schematic views of a heat dissipating apparatus 300 including the ring-shaped heat dissipating device 1 in accordance with another preferred embodiment of the present invention. Besides the ring-shaped heat dissipating device 1, the heat dissipating apparatus 300 further comprises a heat transfer device 3 which is formed in one piece and a manufacturing method thereof will be described later in more detail. Preferably, the heat transfer device 3 could be a lampshade in this embodiment.

With reference to FIGS. 8 and 9, the heat transfer device 3 includes a top plate 31, an annular side plate 32, an annular bottom plate 33 and a bending portion 33. The top plate 31 defines a hole 311 therein aligning to the central passage 100 of the ring-shaped heat dissipating device 1. The annular side plate 32 extends downwardly from an outer edge of the top plate 31 and is inclined outwardly with respect to the top plate 31. The annular bottom plate 33 extends outwardly from a bottom edge of the annular side plate 32. The bending portion 34 extends upwardly from an outer edge of the annular bottom plate 33.

Preferably, the annular bottom plate 33 of the heat transfer device 3 is slightly inclined upwardly from inside to outside thereof, as shown in FIGS. 7 and 9.

FIG. 10 is a schematic view of the manufacturing method of the heat transfer device 3 in another preferred embodiment of the present invention, the method includes steps of:

(a) taking a metal sheet through a first mechanical punching process thereby forming the top plate 31 and a side plate which are generally vertical with each other;

(b) conducting a second mechanical punching process to make the side plate in step (a) to incline outwardly with respect to the top plate 31, and to make a bottom edge of the side plate to bend outwardly, therefore forming the annular side plate 32 and the annular bottom plate 33;

(c) conducting a third mechanical punching process to make the annular bottom plate 33 in step (b) to slightly incline upwardly from inside to outside thereof with respect to the annular side plate 32; and

(d) conducting a fourth mechanical punching process to make an outer edge of the annular bottom plate 33 in step (c) to bend upwardly thereby forming the bending portion 34 and completing the heat transfer device 3.

FIGS. 11 and 12 are schematic views of a manufacturing method of the ring-shaped heat dissipating device 1 of the present invention.

Firstly, a strip of metal sheet is provided, and through a continuously mechanical punching process, the metal sheet becomes a continuously-bending metal sheet 4, as shown in FIG. 11, the continuously-bending metal sheet 4 comprises a plurality of top plates 41, a plurality of side plates 42 and a plurality of bottom plates 43.

Secondly, two ends of the continuously-bending metal sheet 4 are connected together to form a hollow cylinder 5, as shown in FIG. 12, and wherein the top plates 41 of the continuously-bending metal sheet 4 faces central 51 of the hollow cylinder 5, the bottom plates 43 of the continuously-bending metal sheet 4 faces outside of the hollow cylinder 5.

Finally, the hollow cylinder 5 is turned inside out, referring to an arrow shown in FIG. 12, to form the ring-shaped heat dissipating device 1 which is shown in FIG. 1. Referring to FIGS. 1 and 12, the top plates 41 of the continuously-bending metal sheet 4 facing central 51 of the hollow cylinder 5 are turned to face top side of the ring-shaped heat dissipating device 1, and the bottom plates 43 of the continuously-bending metal sheet 4 facing outside of the hollow cylinder 5 are turned to face bottom side of the ring-shaped heat dissipating device 1. In other words, the top plates 41 of the continuously-bending metal sheet 4 become the top plates 11 of fins 10 of the ring-shaped heat dissipating device 1 and the bottom plates 43 of the continuously-bending metal sheet 4 become the bottom plates 14 of fins 10 of the ring-shaped heat dissipating device 1 while the hollow cylinder 5 is turned inside out to form the ring-shaped heat dissipating device 1.

Numerous characteristics and advantages of the invention have been set forth in the foregoing description. The disclosure, however, is illustrative only, and changes may be made in detail within the principle of the invention, to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed. 

The invention claimed is:
 1. A ring-shaped heat dissipating device being a continuously-bending metal sheet and including: a plurality of fins arranged in a radial form and forming a central passage communicating from theretop to therebottom, each of fins comprising: a top plate having two parallel edges; a front side plate having a top edge and a bottom edge which are parallel with each other, the top edge connecting with one of the edges of the top plate; a rear side plate having a top edge and a bottom edge which are parallel with each other, the top edge connecting with another one edge of the top plate; and a bottom plate having a front edge and a rear edge which are parallel with each other, the front edge connecting with the bottom edge of the rear side plate; wherein the bottom edge of the front side plate of each of fins connects with the rear edge of the bottom plate of another fin which is adjacent thereto; wherein the front side plate and the rear side plate of each of fins co-define a first passage communicating from outside to inside; each two adjacent fins co-define a second passage communicating from outside to inside; and each of the first passages and the second passages tapers from outside to inside; wherein top plates of the fins are located on a same level; the top plate of each of fins has an inner edge adjacent to the central passage, and inner edges of the top plates of the fins are connected together to form a top ring edge; wherein bottom plates of the fins are located on a same level; the bottom plate of each of fins has an inner edge adjacent to the central passage, and inner edges of the bottom plates of the fins are connected together to form a bottom ring edge.
 2. The ring-shaped heat dissipating device of claim 1, wherein the fins are further arranged in a circular shape.
 3. A heat dissipating apparatus comprising: a ring-shaped heat dissipating device defining a central passage therein; and a heat transfer device formed in one piece and comprising a top plate which defines a hole therein, a top surface of the top plate being in contact with a bottom surface of the ring-shaped heat dissipating device, and the hole of the top plate of the heat transfer device aligning to the central passage of the ring-shaped heat dissipating device.
 4. The heat dissipating apparatus of claim 3, wherein the ring-shaped heat dissipating device is made of a continuously-bending metal sheet and includes a plurality of fins arranged in a radial from and encircling the central passage, wherein each of fins comprises: a top plate having two parallel edges; a front side plate having a top edge and a bottom edge which are parallel with each other, the top edge connecting with one of the edges of the top plate; a rear side plate having a top edge and a bottom edge which are parallel with each other, the top edge connecting with another one edge of the top plate; and a bottom plate having a front edge and a rear edge which are parallel with each other, the front edge connecting with the bottom edge of the rear side plate; wherein the bottom edge of the front side plate of each of fins connects with the rear edge of the bottom plate of another fin which is adjacent thereto; wherein the front side plate and the rear side plate of each of fins co-define a first passage communicating from outside to inside; two adjacent fins co-define a second passage communicating from outside to inside; and each of the first passages and the second passages tapers from outside to inside; wherein top plates of the fins are located on a same level; the top plate of each of fins has an inner edge adjacent to the central passage, and inner edges of the top plates of the fins are connected together to form a top ring edge; wherein bottom plates of the fins are located on a same level; the bottom plate of each of fins has an inner edge adjacent to the central passage, and inner edges of the bottom plates of the fins are connected together to form a bottom ring edge.
 5. The heat dissipating apparatus of claim 3, wherein the heat transfer device further comprises an annular side plate extending downwardly from an outer edge of the top plate and inclined outwardly with respect to the top plate, an annular bottom plate extending outwardly from a bottom edge of the annular side plate, and a bending portion extending upwardly from an outer edge of the annular bottom plate.
 6. The heat dissipating apparatus of claim 5, wherein the ring-shaped heat dissipating device is made of a continuously-bending metal sheet and includes a plurality of fins arranged in a radial from and encircling the central passage, wherein each of fins comprises: a top plate having two parallel edges; a front side plate having a top edge and a bottom edge which are parallel with each other, the top edge connecting with one of the edges of the top plate; a rear side plate having a top edge and a bottom edge which are parallel with each other, the top edge connecting with another one edge of the top plate; and a bottom plate having a front edge and a rear edge which are parallel with each other, the front edge connecting with the bottom edge of the rear side plate; wherein the bottom edge of the front side plate of each of fins connects with the rear edge of the bottom plate of another fin which is adjacent thereto; wherein the front side plate and the rear side plate of each of fins co-define a first passage communicating from outside to inside; two adjacent fins co-define a second passage communicating from outside to inside; and each of the first passages and the second passages tapers from outside to inside; wherein top plates of the fins are located on a same level; the top plate of each of fins has an inner edge adjacent to the central passage, and inner edges of the top plates of the fins are connected together to form a top ring edge; wherein bottom plates of the fins are located on a same level; the bottom plate of each of fins has an inner edge adjacent to the central passage, and inner edges of the bottom plates of the fins are connected together to form a bottom ring edge.
 7. The heat dissipating apparatus of claim 5, wherein the annular bottom plate of the heat transfer device is slightly inclined upwardly from inside to outside thereof.
 8. The heat dissipating apparatus of claim 7, wherein the ring-shaped heat dissipating device is made of a continuously-bending metal sheet and includes a plurality of fins arranged in a radial form and encircling the central passage, wherein each of fins comprises: a top plate having two parallel edges; a front side plate having a top edge and a bottom edge which are parallel with each other, the top edge connecting with one of the edges of the top plate; a rear side plate having a top edge and a bottom edge which are parallel with each other, the top edge connecting with another one edge of the top plate; and a bottom plate having a front edge and a rear edge which are parallel with each other, the front edge connecting with the bottom edge of the rear side plate; wherein the bottom edge of the front side plate of each of fins connects with the rear edge of the bottom plate of another fin which is adjacent thereto; wherein the front side plate and the rear side plate of each of fins co-define a first passage communicating from outside to inside; two adjacent fins co-define a second passage communicating from outside to inside; and each of the first passages and the second passages tapers from outside to inside; wherein top plates of the fins are located on a same level; the top plate of each of fins has an inner edge adjacent to the central passage, and inner edges of the top plates of the fins are connected together to form a top ring edge; wherein bottom plates of the fins are located on a same level; the bottom plate of each of fins has an inner edge adjacent to the central passage, and inner edges of the bottom plates of the fins are connected together to form a bottom ring edge.
 9. A manufacturing method of a ring-shaped heat dissipating device comprising steps of providing a strip of metal sheet; continuously punching the metal sheet to make the metal sheet being continuously-bending and including a plurality of top plates, a plurality of side plates and a plurality of bottom plates; connecting two ends of the metal sheet to form a hollow cylinder, the top plates of the metal sheet facing central of the hollow cylinder and the bottom plates of the metal sheet facing outside of the hollow cylinder; and turning the hollow cylinder inside out to form the ring-shaped heat dissipating device, wherein the top plates are turned to face top side of the ring-shaped heat dissipating device, and the bottom plates are turned to face bottom side of the ring-shaped heat dissipating device. 